It sounds like the entire screen goes blank with your problem. My problem is the lower half of the screen goes blank. Do you think the SSB is also the problem? What are your thoughts about the "Video Board" or the X Board?

That's a fairly common indication that a component in the main power supply called an 'electrolytic capacitor' is fading away.
These are used as filters and in feedback paths in switched mode power supplies and one of the parts on which mfr.'s safe a nickel or two. If these parts are not rated for the type of service they perform (higher frequencies and ripple current) they chemically break down and lose value until they no longer can serve their purpose.
If you open the back of the set after allowing a number of hours (overnight is better) with the plug pulled, look for a smaller circuit board with larger than average parts. Some of these will be blocks (transformers and chokes) and it will have cylindrical 'cans' that are mounted 90 degrees to the board.
Look for a part number which may be on a sticker.
If you can find this, contact Panasonic service in your area and ask about repair or replacement cost of this board.
If either causes a faint heart, check on the site below to see if they happen to have this board on hand, it may save some money:
Jimmy's Parts
Subassemblies are normally plugged in and won't require soldering to replace.

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Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.http://electronicshelponline.blogspot.com/

This is my second set in as much days from Best buy. Exact same problem.I just bought 32 inch 2 hours
ago, and am using it with an antenna. Almost every time I turn to
channel 5, the remote freezes and I can't even use the buttons on the
side of the tv.

I would just replace the TV, because any guess you make without the testing and equipment is just an expensive guess. New TV's are cheap by comparison. I have had a lot of TV'ds and the best do far is my Vizio 42 Inch LCD. 11 years old no issues.

Ur tv have CRT tubes coolant problems.Must be replaced CRTS coolant chemicals,to clear it up.Tries websites like Tvrepairworld.com,Tvrepairkits.com to buy these coolant kits,it also came with a tutoring DVD also.

The TV is under a LG factory 1 year warranty.
Unless you bought a refurbished unit which has a 30 day warranty.
Contact LG @ 1 800 243-0000 for warranty repairs.
Be sure to have the...
Date of purchase
Model#
Serial#
And Product code.

The information is on the back of the TV or on a small white tag
on the side of the TV.